| 摘要 |
The invention concerns a reinforced concrete drain element built in a single piece by at least a base and two wings with globally U-shaped cross-section and whereof each of the ends form a connection surface designed to co-operate with the parting surface of another consecutive element. The invention is characterised in that it comprises interlocking linking means (3 and 4) facing each other at the end (1a) of an element (1) and at the end (2a) of a consecutive element (2), which means are complementary and designed both to guide an element when it is being laid, relative to another (1) already laid, to make them self-aligned and to lock them positively, at least in the longitudinal direction once both have been laid. |
